A two-component model for hadron production in high-energy pp collisions

1985 ◽  
Vol 89 (4) ◽  
pp. 353-380 ◽  
Author(s):  
H. Banerjee ◽  
T. De ◽  
D. Syam
Keyword(s):  
High Energy ◽  
Hadron Production ◽  
Component Model ◽  
Pp Collisions ◽  
Two Component

scholarly journals Two-Component Model and Geometric Picture for High Energy P-P Collisions

1979 ◽  
Vol 61 (1) ◽  
pp. 151-164
Author(s):  
N. Hashimoto
Keyword(s):  
High Energy ◽  
Component Model ◽  
Two Component ◽  
Geometric Picture

scholarly journals Identified hadron production in a two component model

2016 ◽  
Vol 273-275 ◽  
pp. 2714-2716
Author(s):  
A.A. Bylinkin ◽  
A.A. Rostovtsev
Keyword(s):  
Hadron Production ◽  
Component Model ◽  
Two Component

scholarly journals Testing two-component models on very high-energy gamma-ray-emitting BL Lac objects

2020 ◽  
Vol 640 ◽  
pp. A132
Author(s):  
◽  
V. A. Acciari ◽  
S. Ansoldi ◽  
L. A. Antonelli ◽  
A. Arbet Engels ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Component Model ◽  
Bl Lac Objects ◽  
Two Component ◽  
Very High Energy ◽  
Component Models ◽  
Very High ◽  
Optical Polarisation

Context. It has become evident that one-zone synchrotron self-Compton models are not always adequate for very high-energy (VHE) gamma-ray-emitting blazars. While two-component models perform better, they are difficult to constrain due to the large number of free parameters. Aims. In this work, we make a first attempt at taking into account the observational constraints from very long baseline interferometry (VLBI) data, long-term light curves (radio, optical, and X-rays), and optical polarisation to limit the parameter space for a two-component model and test whether or not it can still reproduce the observed spectral energy distribution (SED) of the blazars. Methods. We selected five TeV BL Lac objects based on the availability of VHE gamma-ray and optical polarisation data. We collected constraints for the jet parameters from VLBI observations. We evaluated the contributions of the two components to the optical flux by means of decomposition of long-term radio and optical light curves as well as modelling of the optical polarisation variability of the objects. We selected eight epochs for these five objects based on the variability observed at VHE gamma rays, for which we constructed the SEDs that we then modelled with a two-component model. Results. We found parameter sets which can reproduce the broadband SED of the sources in the framework of two-component models considering all available observational constraints from VLBI observations. Moreover, the constraints obtained from the long-term behaviour of the sources in the lower energy bands could be used to determine the region where the emission in each band originates. Finally, we attempt to use optical polarisation data to shed new light on the behaviour of the two components in the optical band. Our observationally constrained two-component model allows explanation of the entire SED from radio to VHE with two co-located emission regions.

scholarly journals Comparing the PYTHIA Monte Carlo to a two-component (soft + hard) model of hadron production in high-energy p–p collisions

2019 ◽  
Vol 28 (04) ◽  
pp. 1950023 ◽  
Author(s):  
Thomas A. Trainor
Keyword(s):  
Monte Carlo ◽  
Fold Increase ◽  
Detailed Comparison ◽  
High Energy ◽  
Hadron Production ◽  
Collision Dynamics ◽  
Final State ◽  
Dijet Production ◽  
Two Component ◽  
Almost All

The PYTHIA Monte Carlo (PMC), first introduced more than 30 years ago, remains a popular simulation tool both for analysis of [Formula: see text]–[Formula: see text] collision dynamics and for detector design and calibration. The PMC assumes that almost all hadron production results from parton–parton scatterings described by pQCD and that multiple parton interactions (MPIs) per collision event are a common occurrence. In contrast, a two-component (soft + hard) model (TCM) of high-energy collisions, inferred inductively from a variety of data formats, attributes a majority of final-state hadrons to projectile-nucleon dissociation and a minority to minimum-bias (MB) dijet production (corresponding to measured jet spectra and fragmentation functions (FF)). The observed jet-related hadron yield is precisely proportional to the square of the nonjet yield over an interval corresponding to 100-fold increase in dijet production. The two data descriptions appear to be in conflict. This study presents a detailed comparison of the two models and their relations to a broad array of collision data. The PMC appears to disagree with some data, whereas the TCM provides an accurate and comprehensive data description.

Multiplicity Distributions in High Energy Hadron-Nucleus Collisions and the Mixed Two Component Model

1982 ◽  
Vol 67 (6) ◽  
pp. 2002-2005
Author(s):  
S. Date ◽  
K. K. Phua
Keyword(s):  
High Energy ◽  
Component Model ◽  
Two Component ◽  
Multiplicity Distributions ◽  
Energy Hadron

scholarly journals Two component model for hadroproduction in high energy collisions

2017 ◽  
Author(s):  
Aleksandr Bylinkin
Keyword(s):  
High Energy ◽  
Component Model ◽  
Two Component ◽  
High Energy Collisions

scholarly journals A two-component model for the high-energy variability of blazars

2012 ◽  
Vol 545 ◽  
pp. A125 ◽  
Author(s):  
M. M. Reynoso ◽  
G. E. Romero ◽  
M. C. Medina
Keyword(s):  
High Energy ◽  
Component Model ◽  
Two Component

scholarly journals Two component model for hadroproduction in high energy collisions

2016 ◽  
Author(s):  
Aleksandr Bylinkin
Keyword(s):  
High Energy ◽  
Component Model ◽  
Two Component ◽  
High Energy Collisions

Radiometric Chronology of Neh–nar Glacier, Kashmir

1982 ◽  
Vol 28 (98) ◽  
pp. 91-105 ◽  
Author(s):  
V. N. Nijampurkar ◽  
N. Bhandari ◽  
C. P. Vohra ◽  
V. Krishnan
Keyword(s):  
Average Rate ◽  
Component Model ◽  
Vertical Profiles ◽  
Kashmir Valley ◽  
Movement Rate ◽  
Accumulation Zone ◽  
Core Samples ◽  
Surface Samples ◽  
Two Component

AbstractSurface and core samples of Neh–nar Glacier in the Kashmir Valley have been analysed for the radionuclides 32Si. 210Pb, 40K, and 137Cs. The lateral and vertical profiles (at an altitude of about 4 140 m) reveal:(1)32Si activity decreasing slowly from the accumulation zone to 4 050 m altitude and then abruptly towards the snout.(2)Five zones of alternating high and low 210Pb activity in the surface samples.(3)An horizon at between 2 and 3 m depth containing 210Pb activity above natural levels. This horizon is also associated with 137Cs and a maximum in total ß activity.The ice samples have been dated on the basis of a simplified two–component model, the “fresh“contribution determined by 2l0Pb and the old component by 32Si. The following conclusions can be drawn from these observations:(1)The model age of the snout ice is c. 850 years.(2)The average rate of ice movement in the lower glacier is about 2 m/year, which compares well with the annual movement rate of 2.65 m/year observed since 1974.

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